From YUMBOX.com Yumbox Original 6-compartment food tray insert (Madagascar) Compatible with Yumbox Original 6-compartment exterior boxes only. Not compatible with other Yumbox sizes or models. Ideal to use as an extra tray for prepping Yumbox meals. Pack ahead or use for meals at home. Dimensions Yumbox Original: 8.5 (l) x 6 (w) x 1.8 (h) inches